Brother MFC640CW - Page 148

Brother MFC640CW

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5-62 Confidential

(8) Unhook the sensor actuator spring from the paper pressure holder and turn the registration

sensor actuator in the direction of the arrow as shown below to release it.

Hooking the sensor actuator spring

Registration sensor actuator

Sensor actuator spring

Registration sensor actuator

Paper pressure holder

Sensor actuator spring

Table of Contents

Default Chapter1
- Service Manual1
- How this Manual Is Organized3
- Safety Precautions6
- To Use the Machine Safely6
- Caution7
- Warning7
- Choosing a Location8
- Parts Names & Functions9
- Front View11
- Outline11
- Rear View11
- Control Panel13
- Mfc820Cw13
- Menu Keys14
- On/Off14
- Start Keys14
- Stop/Exit14
- Dial Pad15
- Ink15
- Message Center Keys15
- Telephone Keys15
- Black Start16
- Copy Options16
- Fax Resolution16
- Navigation Keys16
- Color Start17
- Copy Keys (Temporary Settings)17
- Mono Start17
- Ink Management18
- Liquid Crystal Display18
- Photocapture18
- Scan18
- Components19
- Specifications20
- Table of Contents21
Chapter 2 Specifications22
- General Specifications22
  - Dimensions (W X D X H)23
  - Weight23
- Paper Specifications24
- Printable Area27
- Unprintable Area27
Specifications List28
- Post Card32
- Post Card33
- Full35
- Theory of Operation37
Chapter 3 Theory of Operation38
Overview39
Mechanical Components40
- Scanner Mechanism41
- Printing Mechanism41
Control Electronics78
- Components78
Chapter 5 Disassembly/Reassembly and Lubrication87
Disassembly/Reassembly87
- Safety Precautions87
- Tightening Torque88
- Preparation89
- How to Access the Target Component89
Lubrication161
- Document Pull-In Roller and Document Separation Roller162
- Adjustments and Updating of Settings163
- Required after Parts Replacement163
- Executables / Files Required for Adjustments and Updating of Settings166
- Requirements166
- Spare Parts/Supplies Required for Adjustments/Updating of Settings166
Chapter 6 Adjustments and Updating of Settings166
Preparation166
- Loading the Update Programs/Data to the Machine167
If You Replace the Head/Carriage Unit or Engine Unit171
- 1 ] Update the Head Property Information Stored in the EEPROM171
- On the Main PCB173
- 2 ] Clean the New Head/Carriage Unit174
- 3 ] Correct the Positioning Error of the Head/Carriage Unit175
- 4 ] Update the Paper Feeding Correction Value177
- 5 ] Align Vertical Print Lines180
- 6 ] Margin Adjustment in Near-Edge Printing182
- 7 ] Print out a Test Pattern185
- 8 ] Switch Back to Standby185
- 9 ] Replace the Ink Cartridges with Protective Ones185
If You Replace the Main Pcb186
- 1 ] Load Update Programs/Data186
- 2 ] Initialize the EEPROM on the Main PCB (Function Code 01)186
- 3 ] Customize the EEPROM on the Main PCB (Function Code 74)187
- 4 ] Check the Control Panel PCB for Normal Operation (Function Code 13)187
- 5 ] Make a Sensor Operational Check (Function Code 32)187
- 6 ] Acquire White Level Data and Set the CIS Scanner Area (Function Code 55)187
- 7 ] Set an ID Code and Update the Head Property Information187
- 8 ] Update the Paper Feeding Correction Value190
- 9 ] Align Vertical Print Lines190
- 10 ] Margin Adjustment in Near-Edge Printing190
- 11 ] Adjust the Light Intensity of the LCD Backlight190
- 12 ] Specify the CIS Type (Function Code 59)190
- 13 ] Switch Back to Standby190
Chapter 8 Maintenance M Ode199
Entry into the Maintenance Mode199
List of Maintenance-Mode Functions200
User-Access to the Maintenance Mode201
Detailed Description of Maintenance-Mode Functions203
- EEPROM Parameter Initialization (Function Code 01, 91)203
- Printout of Scanning Compensation Data (Function Code 05)204
- Test Pattern (Function Code 09)206
- Error Indication and Troubleshooting249
Chapter 9 Error Indication and Troubleshooting252
Error Indication252
- Equipment Errors252
- 1 ] Error Messages Appearing on the LCD252
- 2 ] Error Codes Contained in "MACHINE ERROR X X" Messages256
- Communications Errors270

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